I literally quoted a source. Want more? This is the Cathechism of the Catholic Church on the topic of free will:
1730 God created man a rational being, conferring on him the dignity of a person who can initiate and control his own actions. "God willed that man should be 'left in the hand of his own counsel,' so that he might of his own accord seek his Creator and freely attain his full and blessed perfection by cleaving to him."
1739 Freedom and sin. Man's freedom is limited and fallible. In fact, man failed. He freely sinned. By refusing God's plan of love, he deceived himself and became a slave to sin. This first alienation engendered a multitude of others. From its outset, human history attests the wretchedness and oppression born of the human heart in consequence of the abuse of freedom.
If instead you were looking for philosophical evidence for God's existance, I recommend reading Thomas Aquinas' Five Ways.
I mainly write JS and not having a backtick on my keyboard annoys the fuck out of me. Other than that the Italian keyboard is alright, never had any other problems with it.